TWI770647B - Solar module - Google Patents

Abstract

A solar module including back-sheet, solar cells, first bus ribbon, second bus ribbon, and connector is provided. The back-sheet has a carrier surface. The solar cells are disposed on the carrier surface. The first bus ribbon is electrically connected to part of the solar cells, having a first end. The second bus ribbon is electrically connected to the other part of the solar cells, having a second end. The first bus ribbon and the second bus ribbon are disposed between the solar cells. The connector is disposed between the solar cells and the back-sheet, connecting the first bus ribbon and the second bur ribbon. The connector has a first holding part and a second holding part. The first holding part covers the first end and the second end. The second holding part connects and surrounds the first holding part.

Description

solar module

The present invention relates to an electrical equipment, in particular to a solar module.

Solar power can convert sunlight into electrical energy, creating a new form of life for human beings and becoming one of the main renewable energy sources for human development.

Existing solar panels may include a plurality of solar cells, and these solar cells may be connected by busbars. In order to reduce the energy loss of solar panels, bus bars are now also placed between these solar cells. However, the bus bars between these solar cells are prone to adhesive residues and warpage at the bends, resulting in a de-lamination issue of the solar panel. Therefore, how to make a solar panel with good connection quality is still one of the problems to be solved in the art.

The present invention provides a solar module with a good light-receiving surface.

A solar module according to an embodiment of the present invention includes a backplane, a plurality of solar cells, a first bus bar, a second bus bar, and a connecting element. The backplane has a load bearing surface. These solar units are arranged on the bearing surface. The first bus bar electrically connects some of the solar cells and has a first end. The second bus bar is electrically connected to another part of the solar cells and has a second end. The first bus bar and the second bus bar are arranged between the solar units. The connecting element is disposed between the solar units and the backplane and connects the first bus bar and the second bus bar. The connecting element includes a first shielding portion and a second shielding portion. The first shielding portion covers the first end and the second end. The second shielding portion is connected to and surrounds the first shielding portion.

In an embodiment of the present invention, the above-mentioned solar module further includes a light-transmitting cover plate. The light-transmitting cover plate is disposed on the solar units, and the solar units are located between the back plate and the light-transmitting cover plate. Part of the first shielding part is located between the transparent cover plate and part of the first bus bar, and another part of the first shielding part is located between the transparent cover plate and part of the second bus bar.

In an embodiment of the present invention, the above-mentioned solar module further includes a first adhesive layer and a second adhesive layer. The first adhesive layer connects the light-transmitting cover plate and the first shielding portion. The second adhesive layer connects the backplane and the second shielding portion. The solar cells are distributed between the first adhesive layer and the second adhesive layer.

In an embodiment of the present invention, the above-mentioned first bus bar and second bus bar extend along the first direction. The first width of the first shielding portion in the first direction falls within a range of 8 mm to 20 mm.

In an embodiment of the present invention, the above-mentioned first bus bar and second bus bar extend along the first direction. The second width of the first shielding portion in the second direction falls within a range of 5 mm to 10 mm. The first direction is perpendicular to the second direction.

In an embodiment of the present invention, the above-mentioned first shielding portion includes a groove. The groove accommodates part of the first bus bar and part of the second bus bar.

In an embodiment of the present invention, the depth of the groove in the third direction is between 175 μm and 350 μm. The third direction is parallel to the normal vector of the bearing surface.

In an embodiment of the present invention, a slot is formed between the first shielding portion and the second shielding portion, and the slot is a U-shaped, U-shaped or arc-shaped.

In an embodiment of the present invention, the above-mentioned connecting element is formed of a flexible material.

In an embodiment of the present invention, the above-mentioned solar module further includes a light absorbing material. The light absorbing material is disposed on the surface of the connecting element facing away from the backplane.

In an embodiment of the present invention, the above-mentioned backplane has connection holes. The position of the first shielding portion corresponds to the position of the connecting hole. The first end and the second end pass through the connecting hole.

As can be seen from the above, the solar module of the present invention can be arranged between the solar units by connecting the first bus bar and the second bus bar flat.

The solar module of the embodiment of the present invention has good connection quality, and the solar module can be applied to a solar panel. Specifically, the solar module of the embodiment of the present invention can be applied to a solar panel with multi-busbar (MBB) and half-cut cells (HCC).

It will be understood that, although the terms "first", "second", etc. may be used herein to describe various elements, components or sections, these elements, components or sections should not be limited by these terms. These terms are only used to distinguish one element, component or section. Thus, "a first element," "a first element," or "a first unit" discussed below could also be termed a "second element," "a second element," or "a second element" without departing from the teachings herein .

In the additional drawings, the thickness of layers, films, panels, regions, etc., are exaggerated or reduced for clarity. Throughout the specification, the same reference numerals refer to the same elements. It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. "Connected" as used herein may refer to a physical and/or electrical connection. Furthermore, "electrically connected" or "coupled" may refer to the existence of other elements between the two elements.

FIG. 1 is an exploded perspective view of a solar module according to an embodiment of the present invention, and FIG. 1 is an exploded perspective view of the solar module with the back plate facing upward. Referring to FIG. 1, in an embodiment of the present invention, a solar module 100 includes a backplane 110, a solar unit 120, a solar unit 121, a solar unit 122, a solar unit 123, a first bus bar 130, and a second bus bar 140 and connecting element 150. The connecting element 150 includes a first shielding portion 151 and a second shielding portion 152 .

The back sheet 110 has a bearing surface 111 , and the solar units 120 to 123 are arranged on the bearing surface 111 . FIG. 2 is a schematic plan view of a solar module according to an embodiment of the present invention, and the elements above the solar units 120 to 123 are omitted from the drawing in FIG. 2 . Referring to FIG. 2 , for example, the carrying surface 111 of the backplane 110 of this embodiment has a first area 112 , a second area 113 , a third area 114 and a fourth area 115 . The solar unit 120 is disposed in the first area 112 of the carrying surface 111 , the solar unit 121 is disposed in the second area 113 of the carrying surface 111 , the solar unit 122 is disposed in the third area 114 of the carrying surface 111 , and the solar unit 123 is disposed on the carrying surface 111, Fourth District 115.

The first bus bar 130 is electrically connected to the solar units 120 and 121 and has a first end 131 . The second bus bar 140 is electrically connected to the other solar cells 122 and 123 and has a second end 141 . The first bus bar 130 and the second bus bar 140 are arranged between the solar units 120 to 123 .

For example, the first bus bar 130 is located between the first area 112 and the second area 113 of the carrying surface 111 , and the first bus bar 130 is electrically connected to the solar unit 120 and the solar unit 121 . The second bus bar 140 is located between the third area 114 and the fourth area 115 of the carrying surface 111 , and the second bus bar 140 is electrically connected to the solar unit 122 and the solar unit 123 .

The connection element 150 is disposed between the solar units 120 - 123 and the backplane 110 , and the connection element 150 connects the first bus bar 130 and the second bus bar 140 . In other words, the connection element 150 is located between the first bus bar 130 and the second bus bar 140 , and the first bus bar 130 and the second bus bar 140 are each inserted into the connection element 150 .

In this embodiment, the positions of the first shielding portion 151 correspond to the first end 131 and the second end 141 . The first shielding portion 151 covers the first end 131 and the second end 141 , and the second shielding portion 152 is connected to and surrounds the first shielding portion 151 . Specifically, the first shielding portion 151 covers the first end 131 and a portion of the first bus bar 130 adjacent to the first end 131 , and the first shielding portion 151 also covers the second end 141 and a portion of the second end 141 adjacent to the second end 141 . bus bar 140 . Part of the second shielding portion 152 is covered by the first bus bar 130 , and another portion of the second shielding portion 152 is covered by the second bus bar 140 .

In other words, in the connecting element 150 of this embodiment, a slot 153 is formed between the first shielding portion 151 and the second shielding portion 152 , and the first bus bar 130 is inserted into the slot 153 from one side of the connecting element 150 and When reaching the other side, the second bus bar 140 is inserted into the slot 153 from one side of the connecting element 150 and reaches the other side, and the first bus bar 130 and the second bus bar 140 are inserted from different positions of the slot 153 .

Since the solar module 100 of the present embodiment has the connecting element 150, and the connecting element 150 can connect the first bus bar 130 and the second bus bar 140, the bending portion of the first bus bar 130 and the second bus bar 140 can be The connection element 150 is shielded, and the connection element 150 can also disperse the stress generated by the bending of the first bus bar 130 and the second bus bar 140 , thereby enhancing the solar cells 120 - 123 and the first bus bar in the solar module 100 . 130 and the flatness of the second bus bar 140 .

FIG. 3 is a schematic cross-sectional view according to the secant line A-A in FIG. 2 . Please refer to FIG. 3 , specifically, the first bus bar 130 has a first surface 132 and a second surface 133 , and the second bus bar 140 has a third surface 142 and a fourth surface 143 . The first surface 132 and the third surface 142 face away from the backplane 110 , while the second surface 133 and the fourth surface 143 face the backplane 110 . The first shielding portion 151 of the connecting element 150 may bear against part of the first surface 132 of the first bus bar 130 and part of the third surface 142 of the second bus bar 140 . The second shielding portion 152 of the connecting element 150 may bear against part of the second surface 133 of the first bus bar 130 and part of the fourth surface 143 of the second bus bar 140 .

The first bus bar 130 has a first bent portion 134 , and the second bus bar 140 has a second bent portion 144 . The first bent portion 134 is adjacent to the first end 131 , and the second bent portion 144 is adjacent to the second end 141 . The first bent portion 134 of the first bus bar 130 and the second bent portion 144 of the second bus bar 140 can bear against the first shielding portion 151 and will not protrude directly. In other words, the solar units 120 to 123 and the connection element 150 may form a plane on the side away from the back sheet 110 .

In this embodiment, the solar module 100 further includes a light-transmitting cover plate 160 . The light-transmitting cover plate 160 is disposed on the solar units 120 to 123 . These solar units 120 - 123 are located between the back panel 110 and the light-transmitting cover panel 160 . In other words, the light-transmitting cover plate 160 and the back plate 110 are located on opposite sides of the solar module 100 .

Part of the first shielding portion 151 is located between the transparent cover plate 160 and a part of the first bus bar 130 , and another part of the first shielding portion 151 is located between the transparent cover plate 160 and a part of the second bus bar 140 . In other words, relative to the transparent cover plate 160 , a portion of the first bus bars 130 adjacent to the first end 131 is shielded by the first shielding portion 151 , and a portion of the second bus bars 140 adjacent to the second end 141 is shielded by the first shielding portion 151 . Section 151 is shielded.

In this embodiment, the solar module 100 further includes a first adhesive layer 170 and a second adhesive layer 180 . The first adhesive layer 170 connects the transparent cover plate 160 and the first shielding portion 151 , and the second adhesive layer 180 connects the back plate 110 and the second shielding portion 152 . Referring to FIG. 1 , the solar units 120 - 123 are distributed between the first adhesive layer 170 and the second adhesive layer 180 .

Since the first adhesive layer 170 is connected to the first shielding portion 151 , the first bent portion 134 of the first bus bar 130 and the second bent portion 144 of the second bus bar 140 do not directly contact the first adhesive layer 170 . At the same time, the second shielding portion 152 connected to the first shielding portion 151 has a larger area and covers part of the solar cells 120 - 123 , which can disperse the pressure, so that the first bus bar 130 and the second bus bar 140 can pass through the first bus bar 130 and the second bus bar 140 The shielding portion 151 is maintained in an appropriate position.

On the other hand, please refer to FIG. 3 , the first bus bar 130 and the second bus bar 140 of this embodiment extend along the first direction d1, and the first width w1 of the first shielding portion 151 in the first direction d1 falls in the range of 8mm to 20mm. Therefore, the first shielding portion 151 can appropriately shield the first bending portion 134 of the first bus bar 130 and the second bending portion 144 of the second bus bar 140 .

The light-transmitting cover plate 160 in this embodiment may be, for example, an acrylic material or a glass material, and the solar module 100 further includes a light-absorbing material 190 . The light absorbing material 190 is disposed on the surface of the connecting element 150 facing away from the backplane 110 .

Specifically, the light-absorbing material 190 of this embodiment is disposed on the surface 155 of the first shielding portion 151 facing the light-transmitting cover plate 160 and facing away from the back plate 110 and the second shielding portion 152 facing the light-transmitting cover plate 160 and facing away from the back plate 110 . Surface 154 .

In this embodiment, the backplane 110 has a connection hole 116 . The position of the first shielding portion 151 corresponds to the position of the connecting hole 116 , and the first end 131 and the second end 141 pass through the connecting hole 116 . Therefore, the first shielding portion 151 can reduce the influence of the connection caused by the first bent portion 134 of the first bus bar 130 and the second bent portion 144 of the second bus bar 140 .

FIG. 4 is a schematic cross-sectional view according to the secant line B-B in FIG. 2 . Referring to FIG. 4 , in this embodiment, the second width w2 of the first shielding portion 151 in the second direction d2 falls within the range of 5 mm to 10 mm, and the second direction d2 is the same as the above-mentioned first direction d1 vertical.

Further, the first shielding portion 151 of this embodiment includes a groove 156 . The groove 156 accommodates part of the first bus bar 130 and part of the second bus bar 140 (please refer to FIG. 3 ). Therefore, the first shielding part 151 can properly fix and shield the first bus bar 130 .

For example, the depth w3 of the groove 156 in the third direction d3 falls between 175 μm and 350 μm, and the third direction d3 is parallel to the normal vector N of the bearing surface 111 . Therefore, the groove 156 of the first shielding portion 151 can properly accommodate the above-mentioned first bus bar 130 or the second bus bar 140 . It should be noted that, in the drawings referred to in this embodiment, the thicknesses of some elements have been enlarged and drawn for the sake of clarity, and are not intended to limit the size relationship of the elements of the present invention.

FIG. 5 is a schematic plan view of the connecting element 150 in one embodiment of the present invention, and FIGS. 6 and 7 are schematic plan views of the connecting element in other embodiments of the present invention, and FIGS. 5 to 7 and the above-mentioned second FIG. The middle element is a dashed line showing a valley or peak line. Referring to FIG. 5, in this embodiment, the connecting element 150 may be formed of a flexible material, and the flexible material may include polyethylene terephthalate (PET), etc., but the present invention is not limited to this.

The first shielding portion 151 and the second shielding portion 152 of the connecting element 150 in this embodiment are connected, and the second shielding portion 152 surrounds the first shielding portion 151 . A slot 153 is formed between the first shielding portion 151 and the second shielding portion 152 , and the slot 153 is in the shape of ㄇ.

Since the connecting element 150 is formed of a flexible material, the groove 156 may be formed by stamping. The groove 156 of the first shielding portion 151 extends along the first direction d1, and the user can open the first shielding portion 151 and the second shielding portion 152 to allow the above-mentioned first bus bar 130 (refer to FIG. 2) and the second shielding portion 152. The bus bar 140 (refer to FIG. 2 ) is inserted so as to connect the first bus bar 130 and the second bus bar 140 by the connecting element 150 .

In detail, the first shielding portion 151 has a first edge 157 , a second edge 158 and a third edge 159 in a region adjacent to the groove 156 . The first edge 157 and the third edge 159 are parallel to the second direction d2, and the second edge 158 is parallel to the first direction d1. The first shielding portion 151 is connected to the second shielding portion 152 at a side opposite to the second edge 158 , so the first shielding portion 151 can be opened from the second shielding portion 152 to allow the above-mentioned first bus bar 130 (refer to Section 2 Figure ) and the second bus bar 140 (see Figure 2 ) are inserted.

Referring to FIG. 6 , in other embodiments of the present invention, the connecting element 150A includes a first shielding portion 151A and a second shielding portion 152A. The second shielding portion 152A is connected to and surrounds the first shielding portion 151A, and the first shielding portion 151A has a groove 156A.

A slot 153A is formed between the first shielding portion 151A and the second shielding portion 152A, and the slot 153A is U-shaped. Specifically, the first shielding portion 151A has a first edge 157A, a second edge 158A and a third edge 159A in a region adjacent to the groove 156A. The first edge 157A and the third edge 159A are parallel to the second direction d2, and the second edge 158A is parallel to the first direction d1.

In detail, in this embodiment, a chamfered structure is formed between the first edge 157A and the second edge 158A, and a chamfered structure is formed between the second edge 158A and the third edge 159A. The chamfered structures of the first shielding portion 151A can improve the safety during installation, and can also avoid bending.

Referring to FIG. 7 , in another embodiment of the present invention, the connecting element 150B has a first shielding portion 151B and a second shielding portion 152B. The second shielding portion 152B surrounds and connects the first shielding portion 151B, and the slot 153B formed between the first shielding portion 151B and the second shielding portion 152B is arc-shaped, so that the user can easily connect the above-mentioned first confluence. The bars 130 (please refer to FIG. 2 ) and the second bus bars 140 (please refer to FIG. 2 ) are placed into the grooves 156B of the first shielding portion 151B.

To sum up, in the solar module of the embodiment of the present invention, the first bus bar and the second bus bar can be connected by the connecting element, so that the first bus bar and the second bus bar can form a good connection between a plurality of solar energy units. connection effect. The first shielding part of the connecting element can cover the first end of the first bus bar and the second end of the second bus bar, so as to reduce the stress generated by the first bus bar and the second bus bar, which affects the connection effect and the light absorption of the solar module. efficiency.

d1: first direction d2: the second direction d3: third direction N: normal vector w1: first width w2: second width w3: depth 100: Solar Module 110: Backplane 111: Bearing surface 112: District 1 113: Second District 114: District 3 115: District 4 116: Connection hole 120: Solar Unit 121: Solar Unit 122: Solar Unit 123: Solar Unit 130: First bus bar 131: First End 132: First Surface 133: Second Surface 134: The first bending part 140: Second bus bar 141: Second End 142: Third Surface 143: Fourth Surface 144: Second bending part 150: Connecting elements 150A: Connection element 150B: Connecting elements 151: The first shielding part 151A: First shielding part 151B: First shielding part 152: Second shield 152A: Second shielding part 152B: Second shielding part 153: Slotted 153A: Slotted 153B: Slotted 154: Surface 155: Surface 156: Groove 156A: Groove 156B: Groove 157: First Edge 157A: First Edge 158: Second Edge 158A: Second edge 159: Third Edge 159A: Third Edge 160: translucent cover 170: The first adhesive layer 180: Second adhesive layer 190: Light Absorbing Materials

FIG. 1 is a three-dimensional exploded view of a solar module in an embodiment of the present invention; FIG. 2 is a schematic plan view of a solar module in an embodiment of the present invention; Figure 3 is a schematic cross-sectional view according to the secant line A-A in Figure 2; FIG. 4 is a schematic cross-sectional view according to the secant line B-B in FIG. 2; FIG. 5 is a schematic plan view of a connecting element in an embodiment of the present invention; FIG. 6 is a schematic plan view of connecting elements in other embodiments of the present invention; and FIG. 7 is a schematic plan view of a connecting element in another embodiment of the present invention.

Domestic storage information (please note in the order of storage institution, date and number) none Foreign deposit information (please note in the order of deposit country, institution, date and number) none

100: Solar Module

110: Backplane

111: Bearing surface

116: Connection hole

120: Solar Unit

121: Solar Unit

122: Solar Unit

123: Solar Unit

130: First bus bar

131: First End

140: Second bus bar

141: Second End

150: Connecting elements

151: The first shielding part

152: Second shield

160: translucent cover

170: The first adhesive layer

180: Second adhesive layer

Claims (10)

A solar module comprises: a backplane with a bearing surface; a plurality of solar energy units disposed on the bearing surface; a first bus bar electrically connected to a portion of the plurality of solar energy units and having a first end; a second bus bar electrically connected to another part of the plurality of solar energy units and having a second end, and the first bus bar and the second bus bar are disposed between the plurality of solar energy units; and a A connecting element is arranged between the plurality of solar units and the backplane and connects the first bus bar and the second bus bar, the connecting element includes: a first shielding part covering the first bus bar an end and the second end; and a second shielding portion connected to and surrounding the first shielding portion, a slot is formed between the first shielding portion and the second shielding portion, and the slot It is ㄇ-shaped, U-shaped or arc-shaped. The solar module according to claim 1, further comprising: a light-transmitting cover plate disposed on the plurality of solar energy units, and the plurality of solar energy units are located between the back plate and the light-transmitting cover plate , part of the first shielding portion is located between the transparent cover plate and part of the first bus bar, and another part of the first shielding portion is located between the transparent cover plate and part of the second bus bar between the bars. The solar module according to claim 2, further comprising: a first adhesive layer connecting the light-transmitting cover plate and the first shielding portion; and a second adhesive layer connecting the back plate and the back plate. The second shielding portion, and the plurality of solar energy units are distributed between the first adhesive layer and the second adhesive layer. The solar module of claim 1, wherein the first bus bar and the second bus bar extend along a first direction, and the first shielding portion has a first width in the first direction falls in the range of 8mm to 20mm. The solar module of claim 1, wherein the first bus bar and the second bus bar extend along a first direction, and a second width of the first shielding portion in a second direction falls within in the range of 5 mm to 10 mm, and the first direction is perpendicular to the second direction. The solar module of claim 1, wherein the first shielding portion comprises a groove, and the groove accommodates a part of the first bus bar and a part of the second bus bar. The solar module of claim 6, wherein a depth of the grooves in a third direction falls between 175 microns and 350 microns, And the third direction is parallel to the normal vector of the bearing surface. The solar module of claim 1, wherein the connecting element is formed of a flexible material. The solar module according to claim 1, further comprising: a light absorbing material disposed on the surface of the connecting element facing away from the back plate. The solar module of claim 1, wherein the back plate has a connecting hole, the position of the first shielding portion corresponds to the position of the connecting hole, and the first end and the second end through the connecting hole.

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